The Coppock curve is a long-term price momentum indicator used primarily to recognize major bottoms in the stock market. Most technical market analysts consider the Coppock curve to be an excellent tool for discriminating between bear market rallies and true bottoms in the stock market.
Elementary calcium reacts with water. Calcium compounds are more or less water soluble. Calcium carbonate has a solubility of 14 mg/L, which is multiplied by a factor five in presence of carbon dioxide. Calcium phosphate solubility is 20 mg/L, and that of calcium fluoride is 16 mg/L.
Sulfides and hydroxides insoluble in excess sodium hydroxides and sodium peroxide mixture. Precipitated by 95% ethyl alcohol, 12M NH4OH, 3M (NH4)2CO3. Chlorides, sulfides and hydroxides are soluble in water and acids, but carbonates are soluble when there is excess ammonium carbonate.